Rail drill



lowing i a specification.

mg openings in the rails after they have through the medium of substantially 'U- 79 a motor is mounted for operating thedrillmotor and bit carried thereby may have 89 Patented Mar, id, lidfido CARL IE. STOLTZ, 0F CINCINNATI, OHIO, AND ARTHUR M. GILBERT, 0F MATTOON,

' ILLINOIS.

RAIL DRILL.

Application filed November 21, 1921. Serial No. 516,651.

To all whom it may concern: rails forming a trackway and 2 indicates Be it known that we, CARL F. STOLTZ, a the usual form of tie on which the rails are citizen of the United States, residing at Cinmounted, and while the form of rails shown cinnati, in the county of Hamilton, State in thedrawings are designed to carry rail- 5 of Ohio, and ARTHUR M. GILBERT, a citizen road trains it will be understood that the of the United States, residing at Mattoon, drill may be used in connection with rails in the county of Coles and State of Illinois, for electric: trains, or for various other purhave invented certain new and useful lmposes. provements in Bail Drills, of which thefol- In carrying out the invention an electrically operated motor 3 is provided for driv- This invention relates to rail drills and is ing a drill bit 4, and in order to position designed primarily for drilling openings the drill bit so that it will have a direct drive through railroad and other track rails, and from the motor, the motor is suspended beis particularly applicable for drilling bondtween the bifurcated arms 5 of a frame 6 been formed into atrack. One feature of shape straps 7 and cross-bars 8. The upper the invention is the provision of an 8X- ends of the straps 7 are threaded and extend tremely light structure that may be readily through the cross-bars Q and are fixed to the transported from place to place or removed cross-bars by introducing nuts 9 onto the from the track when necessary, .and at the threaded ends of the straps, while the ends same time provide a strong and durable of the cross-bars project over and slide upon construction. the bifurcated arms 5, said ends being en- A further feature of the invention is the tered through guides 10 on said arms, the provision ofasupporting frame upon'which length of the guides being such that the ing bit, the motor and bit being movably longitudinal movement on the frame. The mounted on the frame so that it may be free ends of thearms 5 are bent substantially readily fed to the work. at right angles to the arms and overhang the A further feature of the invention is the head of one rail, while the opposite end of provision of a manually operated lever for the frame rests upon the. head of the op feeding the bit to its work, said lever being posits rail, the downwardly extending ends pivotally connected with the motor housing 11 of the arms 5 holding the frame 6 against and in direct alignment with the longitudimovement in one direction, while pins 12 are nal axis of the bit so that the pressure of the extended downwardly from the arms 5 on lever will cause the bit to feed in a straight the opposite face of the head of the rail from line, that of the depending ends 11, thereby hold A further feature of the invention is in ing the frame against movement in the opposo attaching the lever .to'the motor carrying site direction. The arms 5 are securely held frame that the pressure applied thereon for in spaced relation and rendered more rigid feeding the bit to its work will serve to by connecting their free ends through the direct downward pressure on the frame and medium of a cross-rod 13, said rod also serving hold the same in proper engagement with as a handle for lifting the end of the frame one or both of the rails forming the trackcontaining the motor and drill. After the way. frame has been properly positioned on the Other objects and advantages will be hererails, current is applied to the motor 3 and inafter more fully set forth and pointed out the motor and bit then fed towards one of in the accompanying specification. the rails to be drilled, the guides 10 per- In the accompanying drawings, mitting of this movement of the motor, and

Figure 1 is a transverse vertical sectional in the present instance the feeding of the view through a trackway showing the drill bit towards its work is accomplished through 1% applied to use, a lever 14, the lower end of which passes be- Figure 2 is a top plan view thereof, and tween the bifurcated arms 5 and is pivotally Figure 3 is a sectional view as seen'on line connected with the motor housing at a point 3-3, Figure 2. in direct alignment with the longitudinal Referring to the drawings, 1 indicates the axis of the drill bit, thereby imparting a 3m straight feed or pressure against the bit while the upper end of the lever is slightly curved so as to extend somewhat in a horizontal plane, consequently when downward pressure is applied thereon for feeding the bit to its work, such pressure will be directed against the frame and will serve to securely hold the frame in position on the rails. The lever 14 is pivoted to a link 15, one end of which is in turn pivotally connected to the frame 6, the lever 1 1 and the link 15 having a plurality of openings 16 and 17 respectively, so that said parts may be adjusted with respect to each other for obtaining different movements of the motor and bit carried thereby.

In some instances a supporting foot 18 may be pivoted to the frame 6, and this foot may be used for elevating the frame for bringing the bit to a true horizontal position, or if preferred the frame 6 may end at the point of pivotal connection of the foot with the frame, in which event the foot will be used for supporting one end of the frame.

The present form of drill is substantially a one man drill and while it will perform the same functions as a heavier construction the entire weight thereof is such that one man can readily apply it to use or lift it from off the track, and if desired the end of the frame farthest from the bifurcated end may be swung upwardly until the opposite end slips from off its respective rail so that the entire structure may be rested upon the downwardly extending ends 11, and dragged over the ground similar to a sled, although the weight of the device is such that it may be readily carried.

The elevation of the bit may also be readily controlled by loosening the nuts 9 on the threaded ends of the straps 7 and the motor given a slight rotating motion, the connection between the lever 14 and link 15 being such that a certain amount of movement of the motor may be effected without interrupting the operation of the lever.

It will also be seen that by providing the adjustable pivot points between the lever and link, motors and bits of varying lengths maybe accommodated, and also added or decreased pressure applied against the motor casing for feeding the bit forwardly while in operation.

Having thus fully described our said invention, what we claim as new and desire to secure by Letters Patent, is:

1. A rail drill comprising a frame for engagement with the rails said frame carrying U-shaped suporting means, a motor drill having a circular casing with the drill mounted eccentrioally thereof said casing suported by the U-shaped supporting means whereby a rotary adjustment of the casing in the straps adjusts the drill longitudinally and vertically of the rail web, substantially as set forth.

2. A motor drill comprising a frame for engagement with the rails, a motor drill supported beneath the frame the drill being eccentrioally mounted relative to the motor axis, a link pivoted on the frame, a lever for feeding the drill said lever being pivoted to the link and engaging the motor drill in line with the axis of the drill, substantially as set forth.

3. A motor drill comprising a frame for engagement with the rails, a drill supported beneath the frame, means for preventing movement of the frame in either direction across the rail, a supporting foot pivoted to the frame for elevating the frame said foot being of such a length whereby in vertical position it will extend below the bottom of the rail, substantially as set forth.

In Witness whereof, we have hereunto set our hands and seals at Indianapolis, Indiana, this 17th day of November, A. D. nineteen hundred and twenty-one.

CARL F. STOLTZ. [n.s].

ARTHUR M. GILBERT. [1 s].

Witnesses:

CAREY S. FRYE,

M. L. SHULER. 

